biographic info page in new UI 19B not working for personlization

Content

Dear all,

We have created dff and trying to enable in biographic info section under Personal information page. but not able to edit biographic page. 

We are following Chris borsh video where after enabling sandbox we just need to click Date of birth section, but it is not visible at all. I am trying in Chrome and tried IE also. please see the attached screenshot. We are on 19B

Version

19B